AbleHome Electric Pressure Cooker 8 QT 1250W 9 in 1 Multi-Use Stainless Steel Yogurt Maker, Slower Cooker, Rice Cooker, Saute, Steamer, Warmer

I got this product from Amazon at a discounted price but never realised the reason behind it. The +/- option don't work. Except the saute' option none of the other options work. The timer never goes down even after there is steady pressure inside.Is there any customer care who an help with.